Gummed paper and method of manufacturing the same



E. H.. ANGIER.

GuMMEn PAPER ANn METHOD oE MANUFACTURING THE SAME.

' APPLICATION FILED AUGJG, 1919.

Patented Oct. 26, 1920.

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y Inventar: Edward H .En iev; b M f 'y 7/ Ji s.

UNITED STATEENT OFFICE,

lIIBDIAR-,D H. ANGIER, vOF'FRAMIITGHAM, MASSACHUSETTS Qumran PAPER. A Nn METHOD or MANUFACTURING THE SAME.

To all whom/t may concern Be it known that I, EDWARD H. AN GIER, a citizen of the United States, and resident of Framingham, in the count of Middle- The purpose is to' provide an article of suvtrating one specific method of preparingv perior flexibility andstrength and also one which is'not liable to objectionable curling.

4My invention will best be understood by reference to the following descriptiontaken in connection'with the accompanying drawin s whereinzigurel is a diagrammatic view illusgummed paper, and

Fig. 2 'is' a plan view of a portion of gummed strip. My invention may perhaps be best underl stood if I first describe one particular method of preparing the paper as illustrated dia ammatically in Fig. 1. As there shown I ta e crinkled or -cra ed paper 3, the crinklings of which pre erabl versely -to the grain of t e paper. The crinkled paper may conveniently be prepared from inished pa "er in the manner describedv in the Arkell -atent 790,021. The

-crinkledstrip of paper 3 is then preferably stretched as indicated by the arrows in Fig. 1 to reduce the crinklings to a considerable degree and one side thereofisthen' coated with a suitableadhesive gum as indicated `ia ammatically by the moistening roll 5..

n the stlppling 7 on the vertical portion of the paper and as shown the crinklings or craping's are apparent on both sides. Thou h not necessarily limited thereto I preferab y prepare the paper as hereindescribed by first craping it andfthen gumming it and' also by extendin the crapin s by stretching the pa er. Vhile the .finished product in its pre erred form has a certain elasticity and stretch due to the fresidualv ex- 'pansibilityJ/ of lthe crapin the latter are' 1 the effect 1n-ay'v considera y reduced an conveniently be rather that of afsuperior softness and pliabilitylthan that of elasy.

ig. 2 the gum'coatingis indicated by.

Specification of Letters Patent. Patented O Ct. 26, 1920. Application led August 16, 1919. Serial o. 317,907. l

. ticity although acertain elasticityremains inthe paper which permits it to adapt itself tomore or lessirregular surfaces.

Gummed paper prepared in this manner appears to havethe gum coating broken up more or less along the lines of the crin-` lversely ofthe natural grain of the paper.

A great diiiculty has been found with gummed paper becausexof its tendency to curl when dried, particularly in a direction transverse to the grain. 4find that this dificulty is obviated, to aconsiderable extent with the -paper described. Whilel am not prepared to state definltely the theoretical rcause of the proper- Aties of the paper which 'as I have `empirically demonstrated do exist, I advance the following.` possible explanations: First it may be that the coating of gum as it-dries and shrinks ebbs,v as it were, from the\minute elevations formed by the crinklings and i-nto the corresponding hollows.

The continuity ofthe gum coating is thus broken up -or its thickness is in such a way varied that while the gummed surface is continuous for adhesive purposes, it does not exert a curling pull. on the paper.-

paper until the paper backing is in a state of equilibrium althoughv stlll lying l'lat.

It is further possible` that the contraction of the gum in dr lng draws elastically upon the crinklings o lthe' Since curling has hereto been most marked transversely to the grain ofthe aper which is ordinarily longitudinal of t e strip or web, it is probable that such curling has taken place because the -paper bent more easily in that direction instead of along` the grain where curling is resisted by thevfibers. It is possible that the transverse crinklings rovide 'a sort of artificial grain giving a reinforcement similar to that gwen tolironl by corrugating it, which resists such curling. It may be noted that in whatever manner,

theeffect' is obtained there'is no weakening of the paper. It has been customary to' v attemptl to prevent gummed paper from curliug .by break ing up the coating aftl'A bodiment of my invention by Way of illus it has dried in place. This has necessitated a sharp bending or pounding of the 'paper likely to-weaken the same just Vas paper is weakened by folding and creasing. As contrasted thereto a given length of paper made as here described is probably actually stronger in a transverse direction and, as already pointed out, this is of considerable advantage for many purposes to which such adhesive paper is adapted. v

lt will be understood that by gum I refer to suitable material Which under ordinary conditions is dry and hard but which may readily ,be softened and rendered adhesive by moistening. l f

Having thus described one' preferred emtration, what l claim as nevi7 and desire to secure by Letters Patent is Claims:

l. The method of manufacturing gunnned paper which comprsesz--crinkling the paper, stretching the crinkle'd paper and applyinrg a gum coating.

2; he method of manufacturing gummed paper which comprises first crinkling the paper and then applying a coating of gum thereto.

3. Gummed paper vyhereinxthe paper base 'is provided With minute crinkles substantially transverse to the grain.

4. Gummed paper havinga crinkled pa- '6. Crnkled paper having a dried gum coating on a face thereof.

ln testimony whereof Iv have signedmy name tofthis specification. y

EDWARD HANGER. 

